Home / 137,409.51-189,622.83-76,979.97

Finding the Fourth Proportional to 137,409.51, 189,622.83 and 76,979.97

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Solution

The fourth proportional to 137,409.51, 189,622.83 and 76,979.97 is: 106,231.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,409.51 : 189,622.83 = 76,979.97 : x
  2. Step 2: Convert to fraction form
    137,409.51/189,622.83 = 76,979.97/x
  3. Step 3: Cross multiply
    137,409.51x = 189,622.83 × 76,979.97
  4. Step 4: Simplify right side
    137,409.51x = 14,597,159,764.72
  5. Step 5: Solve for x
    x = 14,597,159,764.72/137,409.51
  6. Step 6: Final answer
    x = 106,231.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.